:root {
  --bg: #f2e7d0;
  --ink: #1f2937;
  --panel: #fff8e7;
  --line: #d7ba8f;
  --board: #e8c796;
}
* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; font-family: "Trebuchet MS", "Segoe UI", sans-serif; background: linear-gradient(135deg, #fff7e2, #f2e7d0 52%, #ebddc1); color: var(--ink); }
.shell { width: min(1120px, 100%); margin: 0 auto; padding: 14px; }
.top { display: flex; justify-content: space-between; align-items: flex-start; gap: 10px; }
.top h1 { margin: 0; font-size: clamp(1.45rem, 3vw, 2.2rem); letter-spacing: 0; }
.top p { margin: 4px 0 0; color: #4b5563; }
button { border: 0; border-radius: 8px; padding: 9px 14px; color: #fff; font-weight: 800; cursor: pointer; min-height: 40px; }
#restartBtn { background: linear-gradient(135deg, #0ea5e9, #0284c7); white-space: nowrap; }
.hud { margin: 12px 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; }
.chip { border: 1px solid var(--line); background: var(--panel); border-radius: 8px; display: flex; justify-content: space-between; gap: 10px; padding: 8px 10px; }
.chip-select { align-items: center; }
#difficultySelect { border: 1px solid #c8aa80; border-radius: 8px; background: #fffdf6; color: #1f2937; padding: 6px 8px; font-weight: 800; }
.layout { display: grid; grid-template-columns: minmax(320px, 580px) 1fr; gap: 14px; align-items: start; }
.stage-shell { width: min(580px, calc(100vw - 28px)); aspect-ratio: 9 / 10; border: 2px solid #7c5c34; border-radius: 8px; overflow: hidden; background: var(--board); box-shadow: 0 18px 44px rgba(70, 50, 25, 0.22); }
#game-stage, #game-stage canvas { width: 100%; height: 100%; display: block; }
.panel { border: 1px solid var(--line); border-radius: 8px; background: var(--panel); padding: 12px; }
.panel h2, .panel h3 { margin: 0 0 8px; }
.panel p { margin: 0 0 8px; color: #4b5563; }
.small { font-size: 0.9rem; }
.reward-box { margin: 12px 0 14px; padding: 10px; border: 1px solid var(--line); border-radius: 8px; background: rgba(255, 253, 246, 0.85); }
#rewardBtn { background: linear-gradient(135deg, #f59e0b, #f97316); }
#unlockBtn { margin-top: 10px; background: linear-gradient(135deg, #7c3aed, #2563eb); }
#rewardBtn:disabled, #unlockBtn:disabled { opacity: 0.55; cursor: not-allowed; }
.reward-note { margin: 8px 0 0; color: #6b7280; font-size: 0.92rem; }
#moves { margin: 0; max-height: 420px; overflow: auto; padding-left: 20px; }
@media (max-width: 920px) { .hud { grid-template-columns: 1fr; } .layout { grid-template-columns: 1fr; } .stage-shell { margin: 0 auto; } }
@media (max-width: 520px) { .top { display: grid; } }